import os
from datetime import timedelta

class Config:
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'abyss-sms-secret-key-2024'
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or 'sqlite:///abyss_sms.db'
    SQLALCHEMY_TRACK_MODIFICATIONS = False

    # Session config
    PERMANENT_SESSION_LIFETIME = timedelta(days=7)
    SESSION_COOKIE_SECURE = False
    SESSION_COOKIE_HTTPONLY = True
    SESSION_COOKIE_SAMESITE = 'Lax'

    # Security
    WTF_CSRF_ENABLED = True
    WTF_CSRF_TIME_LIMIT = 3600

    # Rate limiting
    LOGIN_ATTEMPT_LIMIT = 5
    LOGIN_ATTEMPT_WINDOW = 300  # 5 minutes

    # Captcha settings
    CAPTCHA_ENABLED = True

    # Pagination
    ITEMS_PER_PAGE = 25

class DevelopmentConfig(Config):
    DEBUG = True

class ProductionConfig(Config):
    DEBUG = False
    SESSION_COOKIE_SECURE = True

class TestingConfig(Config):
    TESTING = True
    SQLALCHEMY_DATABASE_URI = 'sqlite:///:memory:'

config = {
    'development': DevelopmentConfig,
    'production': ProductionConfig,
    'testing': TestingConfig,
    'default': DevelopmentConfig
}